Assist systems
Brake assist systems
Introduction
This chapter contains information on the following subjects:
Electronic Stability Control (ESC) 151
Antilock brake system (ABS) 152
Traction Control System (TCS) 152
Electronic Differential Lock (EDL) 152
Driver Steering Recommendation (DSR) 152
Hydraulic Brake Assist (HBA) 152
Hill Hold Control (HHC) 153
WARNING
■
A lack of fuel can cause irregular engine running or cause the engine to
shut down. The brake assist systems would then fail to function – risk of
accident!
■
Adjust the speed and driving style to the current visibility, weather, road
and traffic conditions. The increased safety provided by the brake assist
systems must not tempt you to take safety risks – risk of accident!
■
In the event of an ABS fault, visit a specialist garage immediately. Adjust
your style of driving according to the damage to the ABS, as you will not
know the exact extent of the damage or the extent to which this is limiting
the braking efficiency.
CAUTION
■
All four wheels must be fitted with the same tyres approved by the manufac-
turer to ensure the brake assist systems operate correctly.
■
Changes to the vehicle (e.g. to the engine, brakes, chassis) can influence the
functionality of the brake assist systems » page 169, Services, modifications,
and technical alterations.
■
If a fault occurs in the ABS system, the ESC, ASR and EDL will also not work.
An ABS fault is indicated by the warning light
» page 36.
Electronic Stability Control (ESC)
Fig. 145
ESC system: TCS button
Read and observe and on page 151 first.
The ESC system helps improve control of the vehicle in situations where it is
being operated at its dynamic limits, such as a sudden change to the direction
of travel. Depending on the conditions of the road surface, the risk of skidding
is reduced, thereby improving the vehicle's driving stability .
The ESC system is automatically activated each time the ignition is switched
on.
The direction which the driver wishes to take is determined based on the
steering angle and the speed of the vehicle and is constantly compared with
the actual behaviour of the vehicle. In the event of deviations, such as the car
beginning to skid, the ESC system will automatically brake the appropriate
wheel.
During an intervention of the system, the indicator light
flashes in the in-
strument cluster.
The following systems are integrated into the Electronic Stability Control
(ESC).
›
Antilock Brake System (ABS) » page 152.
›
Traction control (ASR) » page 152.
›
Electronic Differential Lock (EDL) » page 152.
›
Driver Steering Recommendation (DSR) » page 152.
›
Hydraulic Brake Assist (HBA) » page 152.
›
Hill Hold Control (HHC) » page 153.
›
Trailer stabilisation (TSA) » page 168.
The ESC system cannot be deactivated. The
» Fig. 145 button can only be
used to deactivate the TCS.
151
Assist systems
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